EP3359799A1 - A fuel tank arrangement for a dual fuel internal combustion engine - Google Patents
A fuel tank arrangement for a dual fuel internal combustion engineInfo
- Publication number
- EP3359799A1 EP3359799A1 EP15775735.2A EP15775735A EP3359799A1 EP 3359799 A1 EP3359799 A1 EP 3359799A1 EP 15775735 A EP15775735 A EP 15775735A EP 3359799 A1 EP3359799 A1 EP 3359799A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- fuel tank
- arrangement
- conduit
- internal combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 177
- 239000002828 fuel tank Substances 0.000 title claims abstract description 129
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 41
- 230000009977 dual effect Effects 0.000 title claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 69
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 90
- 239000007789 gas Substances 0.000 description 61
- 239000003345 natural gas Substances 0.000 description 45
- 239000000203 mixture Substances 0.000 description 27
- 239000002737 fuel gas Substances 0.000 description 10
- 239000012071 phase Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 240000004752 Laburnum anagyroides Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03519—Valve arrangements in the vent line
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0665—Tanks, e.g. multiple tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0668—Treating or cleaning means; Fuel filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
- F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
- F02M33/08—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the fuel tank
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0082—Devices inside the fuel tank other than fuel pumps or filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/03355—Arrangements or special measures related to fuel tanks or fuel handling for supplying different types of fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
- B60K2015/03509—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems with a droplet separator in the vent line
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
- B60Y2200/145—Haulage vehicles, trailing trucks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to a fuel tank arrangement for dual fuel internal combustion engine of a vehicle.
- the invention also relates to a vehicle comprising such a fuel tank arrangement.
- the invention is applicable on vehicles, in particularly low, medium and heavy duty vehicles commonly referred to as trucks. Although the invention will mainly be described in relation to a truck, it may also be applicable for other type of vehicles such as e.g. working machines, cars, etc.
- propulsion systems for vehicles such as heavy duty vehicles
- internal combustion engines are frequently used. These internal combustion engines are most often propelled by a combustible fuel such as e.g. diesel or petrol.
- a combustible fuel such as e.g. diesel or petrol.
- alternative propulsion methods and/or fuels are being used, either alone or in combination with the well known combustible fuels. These may include, for example, ethanol or electrical propulsion from an electric machine, etc.
- a combustible gas such as e.g. compressed or liquefied natural gas, DME, biogas, etc. has been found a suitable propulsion fuel for vehicles in the form of trucks.
- the combustible gas can be used in combination with the combustible fuel for propelling the internal combustion engine, in the following referred to as a dual fuel internal combustion engine. Since the residuals from the combustible gas are relatively environmentally friendly in comparison to e.g.
- US 2012/0325180 relates to a method for operating an electrically controlled dual fuel compression ignition engine.
- US 2012/0325180 describes a natural gas tank connected to a gas fuel common rail, and a fuel tank which is connected to a liquid fuel common rail. Natural gas and liquid fuel are mixed in a coaxial quill assembly before being provided into the cylinders of the engine. Furthermore, a drain outlet is fluidly connected to the fuel tank to drain fuel from the injectors to the fuel tank.
- US 2012/0325180 is still in need of further development with regards to handling of gases in case of leakage.
- a fuel tank arrangement for a dual fuel internal combustion engine, the fuel tank arrangement comprising a fuel tank arranged to supply liquid fuel to the dual fuel internal combustion engine, wherein the fuel tank arrangement comprises a return conduit connected to the fuel tank and configured to supply leaked fuel from the dual fuel internal combustion engine to the fuel tank, wherein the fuel tank arrangement comprises a first fuel separation arrangement positioned in fluid communication between the fuel tank and an outlet to an ambient environment thereof.
- a dual fuel internal combustion engine should be understood to mean a combustion engine which can be propelled by both a combustible gas and a combustible fuel, or a mixture thereof.
- the combustible fuel may, for example, be diesel or petrol.
- a fuel separation arrangement should be understood to mean an arrangement which is able to separate liquids from gases, or vice versa, which will be described further below. Still further the wording "fluid communication" should in the following and throughout the description be interpreted as valid for fluids in liquid phase as well as in gas phase.
- the ventilation may thus be necessary in order to avoid e.g. burst of the tank.
- the combustible fuel can, by means of the first fuel separation arrangement, be returned to e.g. the fuel tank, while the combustible gas, which is relatively free from mixture with combustible fuel, can be directed towards the ambient environment of the vehicle. It is thus a reduced risk of spilling liquid fuel.
- An advantage is thus that the combustible gases will be vented at a position which is free from inhalation since the density of the combustible gas is lower than air and will thus rise from a relatively high position.
- a further advantage of venting the combustible gas at the relatively high position of the vehicle is that there is a reduced risk of gas ignition since the environment at the vent stack is free from high temperature vehicle components.
- the fuel tank arrangement may comprise a gas tank arranged to supply combustible gas to the dual fuel internal combustion engine.
- combustion gas should in the following and throughout the entire description be interpreted as a gas which can be ignited, either self-ignited by compression or be ignited by e.g. a spark plug.
- the invention should thus not be limited to any specific combustible gas.
- the combustible gas may be natural gas, which is described further below.
- Other alternatives are of course conceivable such as e.g. H 2 , DME, biogas, gaseous hydrocarbons, etc.
- the combustible gas which can be provided in the gas tank can be in liquid phase and in gas phase.
- the wording "combustible gas” should be interpreted to include liquefied gas as well as gas in gas phase.
- the gas tank may be a pressurized gas tank.
- a pressurized gas tank, or a pressure vessel is advantageous since it can store high-pressure gas which is suitable for propelling the dual fuel internal combustion engine.
- the first fuel separation arrangement may be positioned at an upper level of the fuel tank.
- the upper level of the fuel tank should be understood as an upper position of the fuel tank as seen in the vertical direction of the vehicle when the vehicle is standing on a relatively horizontal surface.
- the upper level of the fuel tank is not the upper position of the tank when the vehicle is standing/driving in an uphill or a downhill slope etc.
- Positioning the first fuel separation arrangement at the upper level of the fuel tank thus ensures that combustible gas present in the fuel tank will be provided there through since it will rise towards the surface of the liquid fuel.
- the first fuel separation arrangement may comprise a cavity, at least one inlet through-hole between the cavity and the fuel tank, a return through-hole between the cavity and the fuel tank, and an outlet conduit in fluid communication with the outlet to the ambient environment.
- the mixture of liquid fuel and combustible gas When the mixture of liquid fuel and combustible gas enters the cavity of the first fuel separation arrangement through the at least one inlet through-hole, the mixture will be directed towards an inner surface of the cavity. Hereby, the velocity of the mixture will be reduced. Due to gravity, the relatively heavy liquid fuel will be directed downwards through the return through-hole back to the fuel tank while the combustible gas, which has a density lower than air, will rise and be directed through the outlet conduit.
- the at least one inlet through-hole may be arranged at a position between the return through-hole and the outlet conduit, as seen in a vertical direction thereof. The outlet conduit is thus positioned above the return through-hole.
- a cross-sectional area of the at least one inlet through-hole may be smaller than a cross-sectional area of the cavity.
- the fuel tank arrangement may comprise a second fuel separation arrangement positioned in fluid communication between the first fuel separation arrangement and the outlet to the ambient environment.
- An advantage of using a second fuel separation arrangement is that it is further ensured that liquid fuels will not be leaked to the ambient environment. Hence, in the unlikely event that liquid fuel will be present as a mixture with combustible gas downstream the first fuel separation arrangement; the second fuel separation arrangement will further reduce the probability of liquid fuel leakage to the ambient environment thereof.
- a further advantage of the second fuel separation arrangement is that e.g. rain water from the ambient environment that has entered the second fuel separation arrangement will be separated and prevented from entering the fuel tank.
- the second fuel separation arrangement thus has a dual function of preventing liquid fuel from being directed to the ambient environment and rain water from the ambient environment from entering the fuel tank.
- the second fuel separation arrangement may comprise an inlet conduit and an outlet conduit arranged in fluid communication with each other.
- the inlet conduit may be positioned relative to the outlet conduit with an angle between 65 - 1 15 degrees.
- a cross-sectional area of the inlet conduit of the second fuel separation arrangement may be smaller than a cross-sectional area of the outlet conduit of the second fuel separation arrangement.
- the fuel tank arrangement may comprise a conduit connected upstream the inlet conduit of the second fuel separation arrangement, wherein the conduit and the inlet conduit of the second fuel separation arrangement are arranged approximately perpendicular relative to each other.
- the fuel tank arrangement may comprise a pressure relief valve positioned downstream the first fuel separation arrangement.
- the pressure relief valve is that a safety device is provided for the fuel tank such that the pressure in the fuel tank will be kept at acceptable levels. Hence, the risk of bursting the fuel tank is reduced.
- the outlet to the ambient environment may be positioned at a level vertically above a vehicle compartment of a vehicle to which the fuel tank arrangement is mounted.
- an advantage is that the combustible gas will be vented to the ambient environment at a position which people will not be able to inhale them. Since the density of the combustible gas is lower than air, the combustible gas will thus rise from this relatively high position.
- a vehicle comprising a dual fuel internal combustion engine for propulsion thereof, wherein the vehicle comprises a fuel tank arrangement according to any one of the above described example embodiments of the first aspect of the present invention.
- Fig. 1 is a lateral side view illustrating an example embodiment of a vehicle in the form of a truck
- Fig. 2 is a schematic view illustrating an example embodiment of the fuel tank arrangement according to the present invention
- Fig. 3 is a cross-sectional side view of the first fuel separation arrangement according to an example embodiment of the present invention
- Fig. 4 is a cross-sectional side view of the second fuel separation arrangement according to an example embodiment of the present invention.
- a vehicle 1 comprising a dual fuel internal combustion engine 200.
- the dual fuel internal combustion engine 200 is connected to a fuel tank arrangement 100, such as e.g. a diesel tank, and to a gas tank (1 10 in Fig. 2).
- the fuel tank arrangement 100 and the gas tank 1 10 will be described in further detail below in relation to the description of Fig. 2.
- the dual fuel internal combustion engine 200 is hence propelled by both convention fuel such as e.g. diesel or petrol, as well as by a combustible gas such as e.g. compressed natural gas, DME, biogas, etc.
- a combustible gas such as e.g. compressed natural gas, DME, biogas, etc.
- the combustible gas will in the following be referred to as natural gas, which should not be construed as limiting since the inventive concept is applicable for other type of gaseous fuels as well.
- the vehicle 1 depicted in Fig. 1 is a heavy duty vehicle, here in the form of a truck, for which the inventive fuel tank arrangement 100, which will be described further below, is particularly suitable for.
- Fig. 2 a schematic view of an example embodiment of the fuel tank arrangement 100 according to the present invention is depicted.
- the fuel tank arrangement 100 comprises a fuel tank 102 for storing/containing liquid fuel such as e.g. diesel or petrol, etc.
- the fuel tank 102 is thus arranged in fluid communication with a dual fuel internal combustion engine 200 via a fuel conduit 103.
- the fuel tank arrangement 100 further comprises a combustible gas tank 1 10 arranged in fluid communication with the dual fuel internal combustion engine 200. More particularly, the combustible gas tank 1 10 is arranged in fluid communication with the fuel injection system (not shown) of the dual fuel internal combustion engine 200 via a gas conduit 105. Accordingly, the dual fuel internal combustion engine 200 is propelled by both liquid fuel as well as natural gas.
- the combustible gas tank 1 10 is preferably a gas pressure vessel arranged to store/contain compressed natural gas, in liquid phase as well as in gas phase.
- the dual fuel internal combustion engine may be propelled by up to 95% by natural gas, and thus approximately 5% by liquid fuel.
- a return conduit 104 is arranged in fluid communication between the dual fuel internal combustion engine 200 and the fuel tank 102. More specifically, the return conduit 104 is arranged in connection with the fuel injection system of the dual fuel internal combustion engine 200. The return conduit 104 may also be arranged in communication with a combustion chamber (not shown) of the dual fuel internal combustion engine 200. In cases when there is a leakage from the dual fuel internal combustion engine 200, a mixture of liquid fuel and natural gas will be delivered to the fuel tank 102. In the example embodiment, the mixture will be delivered the bottom, or lower portion, of the fuel tank 102, and the gas bubbles will then rise towards the surface of the liquid fuel.
- a first fuel separation arrangement 106 is positioned in fluid
- the first fuel separation arrangement 106 is connected to an upper level, i.e. an upper portion, of the fuel tank 102 as seen in the vertical direction thererof.
- the first fuel separation arrangement 106 is thus configured to, when liquid fuel and natural gas are received therein, separate the liquid fuel from the natural gas, and thus return the main portion of the liquid fuel back to the fuel tank 102 and transport the natural gas through an outlet conduit 208 arranged downstream the fuel tank 102.
- a valve arrangement, in Fig. 2 depicted as a pressure relief valve 1 14, is arranged downstream the first fuel separation
- the pressure relief valve 1 14 is arranged to be positioned in an opened state for allowing gas to be delivered there through when the pressure in fuel tank 102 exceeds a predetermined pressure limit.
- a predetermined pressure limit for allowing gas to be delivered there through when the pressure in fuel tank 102 exceeds a predetermined pressure limit.
- natural gas is vented from the fuel tank 102 when the pressure in the fuel tank exceeds such predetermined pressure limit.
- the pressure relief valve 1 14 may have an opening pressure range of 0.2 to 0.5 bar.
- a second fuel separation arrangement 1 12 is positioned downstream the pressure relief valve 1 14. The purpose of the second fuel separation
- the second fuel separation arrangement 1 12 is to further ensure that liquid fuel is separated from natural gas. Hence, in the unlikely event that liquid fuel is still present as a mixture with natural gas downstream the first fuel separation arrangement 106, the second fuel separation arrangement 1 12 will hence ensure that the remaining liquid fuel is separated from the natural gas.
- the separated liquid fuel will be delivered from the second fuel separation arrangement 1 12 through a conduit 305 to a drain tank or to the fuel tank 102.
- the conduit 305 may also comprise a plug (not shown) or the like which is arranged to maintain the liquid fuel in the conduit 305.
- the natural gas on the other hand will be directed towards an outlet 108 to the ambient environment via an outlet conduit 304. Still further, the second fuel separation arrangement 1 12 also prevents e.g.
- the second fuel separation arrangement 1 12 also separates rain water, or other fluids that may enter the system from the outside, from entering the fuel tank 102.
- the outlet 108 to the ambient environment is arranged downstream the second fuel separation arrangement 1 12.
- the outlet 108 to the ambient environment is positioned at the vent stack (not shown) of the vehicle 1 above the vehicle chassis compartment. In the event that natural gas is leaked to the ambient environment, the safest position to leak the natural gas is at the relatively high point above, and behind, the chassis compartment of the vehicle 1 , which position is free from high temperature vehicle components.
- the fuel tank arrangement 100 further comprises an air vent valve 107 and an air filter 109, positioned downstream the air vent valve 107, as seen from the fuel tank side, for ventilation of air present in the fuel tank 102.
- the air vent valve 107 and the air filter 109 are, in the example embodiment depicted in Fig. 2, arranged in fluid communication between the fuel tank 102 and the second fuel separation arrangement 1 12 via a separate air conduit 1 1 1 . Filtered air is necessary to add to the fuel tank 102 when liquid fuel is provided to e.g. the dual fuel internal combustion engine 200. Hence, the air vent valve 107 and the air filter 109 separate particles present in the air before the air enters the fuel tank 102.
- Fig. 3 illustrates an example embodiment of the first fuel separation arrangement 106.
- FIG. 3 a cross-sectional side view of an example embodiment of the first fuel separation arrangement 106 is depicted.
- the first fuel separation arrangement 106 is positioned at the upper level of the fuel tank 102 and comprises a cavity 202 arranged to receive a mixture of liquid fuel and natural gas from the fuel tank 102 via inlet through-holes 204.
- inlet through-holes 204 are arranged in the first fuel separation arrangement 106.
- the cross- sectional area of the inlet through-holes 204 i.e. the sum of the cross-sectional areas of the inlet through-holes 204, is preferably smaller than the cross-sectional area of the cavity 202.
- the cavity 202 comprises an inner wall surface 205 which is arranged approximately perpendicular to the direction of the fluids in the inlet through-holes 204.
- the mixture of liquid fuel and natural gas will be directed from the fuel tank 102 into the inlet through-holes 204 and further into the cavity 202 where it will hit the inner wall surface 205 of the cavity 202. Due to the reduction of velocity when entering the cavity 202 and the inner wall surface 205 of the cavity 202, the liquid fuel, which has a higher density than the natural gas, will be directed downwards into the fuel tank 102 via a return through-hole 206.
- the natural gas on the other hand, which density is less than air, will rise through an outlet conduit 208 and directed away from the first fuel separation arrangement 106.
- an edge portion 209 formed by the smaller cross-sectional area of the outlet conduit 208 in comparison to the cross-sectional area of the cavity 202, is arranged at an upper portion of the cavity 202 for preventing liquid fuels from rising into the outlet conduit 208 due to the capillary effect.
- the mixture of liquid fuel and natural gas and air entering the inlet through-holes 204 is depicted by the arrows 201
- the liquid fuel directed back to the fuel tank 102 is depicted by the arrows 203
- the natural gas and air rising through the outlet conduit 208 is depicted by the arrows 207.
- Fig. 4 illustrates a cross-sectional side view of an example embodiment of the second fuel separation arrangement 1 12.
- the second fuel separation arrangement 1 12 comprises an inlet conduit 302, an outlet conduit 304 and a conduit 305 to the drain tank, the fuel tank 102 or a plug (not shown) as described above.
- the inlet conduit 302 is in the example embodiment of Fig. 4 connected to a conduit 306.
- the conduit 306 and the inlet conduit 302 are arranged approximately perpendicular to each other such that an approximately 90 degrees bend is arranged there between.
- the mixture of liquid fuel and natural gas hits an inner surface 303 of the inlet conduit 302, at least a portion of the liquid fuel will, due to gravity, fall down back through the conduit 306.
- a cross-sectional area of the outlet conduit 304 is larger than a cross- sectional area of the inlet conduit 302.
- the inlet conduit 302 and the outlet conduit 304 may be arranged approximately perpendicular to each other and the outlet conduit 304 comprises an inner wall surface 307.
- the velocity thereof will be reduced and the mixture will hit the inner wall surface 307.
- the liquid fuel, which density is heavier than the natural gas will be directed downwards into the conduit 305, while the natural gas, which density is less than air will rise through the outlet conduit 304.
- the inlet conduit 302 and the outlet conduit 304 are arranged perpendicular to each other, it should be readily understood that normal tolerances are within the scope of the present invention.
- the inlet conduit 302 may be arranged within e.g. 65 - 1 15 degrees relative to the outlet conduit 304.
- the outlet conduit 304 comprises an edge portion 309 for preventing liquid fuel from being directed through the outlet conduit 304 due to the capillary effect.
- the edge portion 309 delimits the outlet conduit 304 into first and second outlet conduits, wherein the first outlet conduit has a larger cross-sectional area than the second outlet conduit.
- liquid fuel is depicted by the dashed arrows denoted by 31 1
- the natural gas and air is depicted by the solid arrows 313.
- the dual fuel internal combustion engine 200 is provided with natural gas from the gas tank 1 10 and/or provided with liquid fuel from the fuel tank 102 for propulsion thereof.
- the mixture of natural gas and liquid fuel is delivered to the fuel injection system of the dual fuel internal combustion engine 200 and in the event that the mixture is leaked, it is delivered to the fuel tank 102 via the return conduit 104.
- the natural gas which is delivered to a bottom portion of the fuel tank 102 will rise towards the surface of the liquid fuel present in the fuel tank 102.
- natural gas will thus be provided in the area of the fuel tank 102 delimited by an inner surface of the fuel tank 102 and the surface of the liquid fuel. Since it is unbeneficial to maintain natural gas in the fuel tank 102, there is a need to vent the fuel tank 102. This may be executed when the pressure in the fuel tank 102 exceeds a predetermined pressure threshold limit which can be controlled by the pressure relief valve 1 14.
- the natural gas present in the fuel tank 102 is to be vented, the natural gas is provided into the first fuel separation arrangement 106.
- the first fuel separation arrangement 106 is configured to separate liquid fuel that may be accidentally mixed with the natural gas.
- the liquid fuel is directed back to the fuel tank 102 while the natural gas is directed through the outlet conduit 208 and towards the second fuel separation arrangement 1 12.
- the natural gas is thus directed from the first fuel separation arrangement 106 towards the second fuel separation arrangement 1 12 and in the unlikely event that liquid fuel is still present as a mixture with natural gas when entering the second fuel separation arrangement 1 12, the second fuel separation arrangement 1 12 is configured to direct the liquid fuel through the conduit 305 while the natural gas is directed through the outlet conduit 304 of the second fuel separation arrangement 1 12.
- the liquid fuel may be directed to a drain tank, to the fuel tank 102 or to a plug arranged in the conduit 305 for controllably draining the liquid fuel at a suitable position.
- the natural gas may be directed from the outlet conduit 304 of the second fuel separation arrangement 1 12 and to the ambient environment via the outlet 108 arranged at the vent stack of the vehicle 1 , above and behind the chassis compartment thereof.
- the fuel tank arrangement 100 may in addition comprise a further pressure relief valve (not shown) in direct fluid communication between the fuel tank 102 and the ambient environment.
- This further pressure relief valve is beneficial in the unlikely event that the pressure relief valve 1 14 downstream the first fuel separation arrangement 106 is blocked for some reason and the pressure in the fuel tank increases to critical levels and needs to be ventilated.
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- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/EP2015/073474 WO2017059929A1 (en) | 2015-10-09 | 2015-10-09 | A fuel tank arrangement for a dual fuel internal combustion engine |
Publications (2)
Publication Number | Publication Date |
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EP3359799A1 true EP3359799A1 (en) | 2018-08-15 |
EP3359799B1 EP3359799B1 (en) | 2019-10-02 |
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EP15775735.2A Active EP3359799B1 (en) | 2015-10-09 | 2015-10-09 | A fuel tank arrangement for a dual fuel internal combustion engine |
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US (1) | US10343516B2 (en) |
EP (1) | EP3359799B1 (en) |
CN (1) | CN108138705B (en) |
WO (1) | WO2017059929A1 (en) |
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EP3471986B1 (en) * | 2016-06-15 | 2020-04-15 | Volvo Truck Corporation | A gas tank arrangement |
SE541351C2 (en) * | 2017-12-07 | 2019-08-13 | Scania Cv Ab | An indoor safety device, a liquefied fuel gas system and a vehicle |
DE102018128917A1 (en) * | 2018-11-16 | 2020-05-20 | Volkswagen Aktiengesellschaft | Procedure for determining a fuel quality |
Family Cites Families (19)
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JPS5934932A (en) * | 1982-08-21 | 1984-02-25 | Nissan Motor Co Ltd | Separation chamber structure of fuel tank |
DE19913440A1 (en) * | 1999-03-25 | 2000-10-05 | Bayerische Motoren Werke Ag | Fuel tank ventilation system for motor vehicles has tank constructed for max. operational pressure higher than ambient pressure and closeable ventilation valves |
DE10064592C2 (en) | 2000-12-22 | 2003-12-11 | Siemens Ag | vent |
US6578597B2 (en) * | 2001-03-08 | 2003-06-17 | Stant Manufacturing Inc. | Fuel tank vent system with liquid fuel filter |
US6553974B1 (en) * | 2001-10-24 | 2003-04-29 | Brunswick Corporation | Engine fuel system with a fuel vapor separator and a fuel vapor vent canister |
US6694955B1 (en) * | 2002-07-09 | 2004-02-24 | Brunswick Corporation | Marine engine with primary and secondary fuel reservoirs |
DE10238237A1 (en) * | 2002-08-21 | 2004-03-04 | Daimlerchrysler Ag | Motor vehicle fuel tank has feed pipe for catch pot also forming feed pipe for suction pump |
US7779820B2 (en) * | 2007-07-27 | 2010-08-24 | Ti Group Automotive Systems, L.L.C. | Liquid separator |
US20090266342A1 (en) | 2007-08-05 | 2009-10-29 | Morales Nicholas S | Fuel supply system for the composition of on demand vaporized fuel-air mixture for an internal combustion engine |
US8215290B2 (en) | 2008-10-03 | 2012-07-10 | Stant Usa Corp. | Marine carbon canister |
US20120186560A1 (en) | 2009-02-06 | 2012-07-26 | Exen Holdings, Llc | Homogenizing fuel enhancement system |
EP2341234A3 (en) * | 2009-12-31 | 2012-02-22 | Indopar B.V. | Direct injection bi-fuel system for combustion engines |
KR20120051461A (en) | 2010-11-12 | 2012-05-22 | 현대자동차주식회사 | Lng fuel supplying device for vehicle |
US8944027B2 (en) | 2011-06-21 | 2015-02-03 | Caterpillar Inc. | Dual fuel injection compression ignition engine and method of operating same |
NL2006992C2 (en) * | 2011-06-24 | 2013-01-02 | Indopar B V | Method of switching from a liquefied gas fuel to a liquid fuel being provided to a direct injection combustion engine, and direct injection bi-fuel system for such an engine. |
JP5934932B2 (en) * | 2011-12-28 | 2016-06-15 | パナソニックIpマネジメント株式会社 | Optical waveguide, photoelectric composite wiring board, and method for manufacturing optical waveguide |
JP5638586B2 (en) * | 2012-06-18 | 2014-12-10 | 本田技研工業株式会社 | Fuel supply device |
US9416758B2 (en) | 2012-12-21 | 2016-08-16 | Ford Global Technologies, Llc | Fuel filter |
CA2831762C (en) * | 2013-10-31 | 2015-01-20 | Westport Power Inc. | System and method for delivering a fluid stored in liquefied form to an end user in gaseous form |
-
2015
- 2015-10-09 US US15/766,689 patent/US10343516B2/en active Active
- 2015-10-09 WO PCT/EP2015/073474 patent/WO2017059929A1/en active Application Filing
- 2015-10-09 CN CN201580083613.9A patent/CN108138705B/en active Active
- 2015-10-09 EP EP15775735.2A patent/EP3359799B1/en active Active
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US10343516B2 (en) | 2019-07-09 |
US20180304740A1 (en) | 2018-10-25 |
CN108138705B (en) | 2021-07-13 |
WO2017059929A1 (en) | 2017-04-13 |
CN108138705A (en) | 2018-06-08 |
EP3359799B1 (en) | 2019-10-02 |
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